Lately I have been having some problems injecting Zambon winny w/ 23g pins. I stuck myself for the first time ever in my left delt and when I attempted to inject the plunger wouldn't move. This has happened a couple of times. I don't think it is scar tissue cause I have never shot there and 23g should be more than big enough for winny. Anybody got any ideas what might be going on?

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